Now we open the position dialog on the translation tab, select the sphere representing BubbleRob's body, and enter 0.02 for Along Z. We make sure that the Relative to-item is set to World. Then we click Translate selection. This translates all selected objects by 2 cm along the absolute Z-axis, and effectively lifted our sphere a little bit. In the scene hierarchy, we double-click the sphere's alias, so that we can edit it. We enter bubbleRob and press enter.
-Next we will add a proximity sensor so that BubbleRob knows when it is approaching obstacles: we select [Menu bar --> Add --> Proximity sensor --> Cone type]. In the orientation dialog on the orientation tab, we enter 90 for Around Y and for Around Z, then click Rotate selection. In the position dialog, on the position tab, we enter 0.1 for X-coord. and 0.12 for Z-coord. The proximity sensor is now correctly positioned relative to BubbleRob's body. We double-click the proximity sensor's icon in the scene hierarchy to open its properties dialog. We click Show volume parameter to open the proximity sensor volume dialog. We adjust items Offset to 0.005, Angle to 30 and Range to 0.15. Then, in the proximity sensor properties, we click Show detection parameters. This opens the proximity sensor detection parameter dialog. We uncheck item Don't allow detections if distance smaller than then close that dialog again. In the scene hierarchy, we double-click the proximity sensor's alias in order to edit it. We enter sensingNose and press enter.
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Next we will add a proximity sensor so that BubbleRob knows when it is approaching obstacles: we select [Menu bar --> Add --> Proximity sensor --> Cone type]. In the orientation dialog on the Rotation tab, we enter 90 for Around Y and for Around Z, then click Rotate selection. In the position dialog, on the position tab, we enter 0.1 for X-coord. and 0.12 for Z-coord. The proximity sensor is now correctly positioned relative to BubbleRob's body. We double-click the proximity sensor's icon in the scene hierarchy to open its properties dialog. We click Show volume parameter to open the proximity sensor volume dialog. We adjust items Offset to 0.005, Angle to 30 and Range to 0.15. Then, in the proximity sensor properties, we click Show detection parameters. This opens the proximity sensor detection parameter dialog. We uncheck item Don't allow detections if distance smaller than then close that dialog again. In the scene hierarchy, we double-click the proximity sensor's alias in order to edit it. We enter sensingNose and press enter.
We select sensingNose, then control-select bubbleRob, then click [Menu bar --> Edit --> Make last selected object parent]. This attaches the sensor to the body of the robot. We could also have dragged sensingNose onto bubbleRob in the scene hierarchy. This is what we now have: